Cutter-head.



M. W. IVIATTISON.

CUTTER HEAD.

APPLICATHON HLED FEB. a. l9l5.

Patented Apr. 17, 1917. r

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MAGNUS W. MATTISON, OF BELOIT, WISCONSIN, ASSIGNOR T0 G. MATTISONllLdCI-IINE WORKS, OF BELOIT, WISCONSIN, A. OORPORATIDN OF WISCONSIN.

CUTTER-HEAD.

Specification of Letters Patent.

Patented Apr. 1'7, 191 *3 Application filed February 8, 1915. Serial No.6,676.

To all whom it may concern:

Be it known that I, MAGNUS MATTIsoN, a citizen of the United States,residing at Beloit, in the county of Rock and State of Wisconsin, haveinvented certain new and useful Improvements in Cutter-Heads, of whichthe following is a specification.

This invention relates to cutter-heads for wood-turning and otherwood-working machinery, and particularly to cutter-heads of the type inwhich the knives are secured to knife-carriers which in turn are securedto a cylinder or body portion adapted to be mounted upon a rotary shaft.

The object of the invention is to improve the means for securing theknife-carriers to the body, in order to facilitate the application ofthe knife-carriers to the body and to secure the carriers rigidly inplace.

In the accompanying drawings, Figure 1 is a side elevation of acutter-head embodying the features of my invention, only a few of theknife-carriers being illustrated. Fig. 2 is a left-hand end view of thecutter-head as shown in Fig. 1. Fig. 3 is a fragmental sectional viewtaken in the plane of dotted line 33 of Fig. 2. Fig. 4: is a section online 44 of Fig. 3. Fig. 5 is a perspective view of one form ofknife-carrier. Fig. 6 is a perspective view of a bolt adapted for usewith the knife-carrier shown in Fig. 5. Fig. 7 is a perspective view ofanother form of bolt.

In the-drawings, A denotes a rotary shaft by means of which thecutter-head is supported and driven. The cutter-head comprises a body 1,a number of knife-carriers 2, and knives 3. As many knives will be usedas are needed to produce the given pattern, each knife being fixed to aknifecarrier 2.

The body 1 is polygonal in cross-section. Herein I have shown the bodyas provided with six flat faces 4.- upon each of which a. knife carriermay be mounted. The means for attaching the knife-carrier includes abolt adapted to lie within a T-slot extending longitudinally of the face4. The larger or undercut portion of the T-slot is designated 5 in thedrawings and the narrower portion or neck of the slot is marked 6.

Each knife-carrier comprises a base 7 adapted to fit upon any one of thefaces 4, and an outwardly-extending flange 8 to which a knife having acutting edge of the desired contour may be secured. Upon the bottom ofthe base 7 is a tongue 9 adapted to fit accurately into the neck (3 ofthe T- slot. The base 7 is clamped to the face t by means of a bolt 10having a head 11 adapted to lie within the head 5 of the 'l"slot, thebody 12 of the bolt being adapted to extend through the neck 6 of theT-slot and through a plain opening 18 in the base 7. 14: is a nutadapted to be turned upon the outer end of the bolt to clamp the base 7and the overhanging portion of the walls of the T-slot between the headof the bolt and said nut.

On account of the fact that the body 1 is provided with a plurality offaces l, the knife-carriers necessary in the production of any givenpattern may be distributed around the body 1 and may be staggered inorder to distribute the cutting action around the periphery of thecutter-head. However, it sometimes is desirable to place several ofthe-knife carriers upon one of the faces 1. In order to obviate thenecessity of introducing the bolt into the T-slot through the end of theT-slot, and thus facilitate the application of a knife-carrier to thebody between two other knife-carriers, 1 construct the head of the bolt10 as indicated in Figs. and 7. It will there be seen that the head 11is of generally oblong form, its smaller dimension being slightly lessthan the width of the neck 6 of the T-slot, in order that the bolt headmay be passed through the neck 6. The length of the head 11 is such thatwhen the head is turned to extend crosswise of the T-slot, the ends ofthe head will underlie the overhanging walls of the T-slot and touch theside walls of the head. 5 of the T-slot. Two diametrically oppositecorners of the head 11 are slightly cut away or rounded at 15 tofacilitate the turning of the head in the slot and permit a relativelylarge )OllSlOll of the head to underlie the overhanging walls of theslot.

It will be seen that a lmife-carrier may be placed between two othercarriers, the bolt being inserted longitudinally into the 'T-slot, therotation of the nut 1% serving to turn the head of the bolt so that thebolt head lies crosswise of the slot.

To obviate any possibility of the bolt being accidentally turned intosuch position that the head 11 extends lengthwise of the slot, aninterlocking connection may, if desired, be provided between the carrierand the bolt. Herein I have shown a bolt 10 having a head 11 which isidentical with the head 11 of the bolt 10. The bolt 16" also has a boss16 (Figs. 3, 4 and 6) adjacent to the head 11, said boss being adaptedto lie non-rotatably within a recess 17 in the tongue 9 of theknife-carrier. The boss 16 is of generally oblong shape, its lengthbeing nearly the same as the length of the recess 17, and the width ofthe boss being nearly the same as the width of the recess. Two oppositecorners of the boss are rounded to permit the boss to turn in the neck6.

When the head 11 extends transversely of the T-slot, the boss '16 lieswithin the recess 17. As the bolt cannot then turn with relationto thecarrier, and the carrier cannot turn' with relation to the body byreason of the tongue 9 being within the neck 6 of the slot, it will beseen that the bolt head cannot alccidentally turn into alinement withthe s 0t.

18 is a slot in the end of the bolt 10 to permit the use of a screwdriver if it be found necessaryto apply force to turn the bolt. The slot18 extends substantially longitudinally of the head 11, and thus servesas an indicator of the position of the head in the T-slot. When the slot18 is cross-wise of the T-slot, the operator knows that the bolt head isin looking position.

I claim as my invention:

1. In a cutter-head, abody having a T-slot, a knife-carrier having abase adapted to overlie the slot, a bolt having an elongated headadapted for insertion through the narrow portion of the T-slot, saidhead being adapted to turn in the slot so as to extend cross-wise of theslot, the bolt extending through the base of the lniiite-carrier, and anut on the bolt overlying the base, and coinplementary means on saidknife-carrier and said bolt adapted to lie in said slot and preventrelative rotation between the bolt and the body.

2. In a cutter-head, a body having a T-slot,

a knife-carrier having a base adapted to overlie the slot, a tongue onsaid base having a recess and adapted to lie in the narrow portion ofsaid T-slot, a bolt having an elongated head adapted for insertionthrough the narrow portion of the T-slot, and a boss adapted to lie inthe narrow portion of said T-slot, said head and said boss being adaptedto turn in the slot so as to extend cross-wise of the slot, the boltextending through the base of the knife-carrier, and a nut on the boltoverlying the base, said tongue and slot preventing relative rotationbetween the car rier and the body, and said boss and tongue preventingrelative rotation between the car rier and the bolt.

3. In a cutter head, a body having T-slot with a neck and a head; aknife-carrier hav-' ing a base adapted to overlie the T-slot, aprojecting tongue having a recess and adapted to fit into the neck ofthe T-slot, a bolt having an elongated head and adapted to lie withinthe head of the T-slot, the body of said bolt being adapted to extendthrough the neck of the T-slot and a hole in said knife-carrier, saidbody portion of the bolt having an interlocking boss adapted to 'en-.

gage the walls of said recess, said boss and said head portions of saidbolt having the opposite corners thereof cut away or rounded wherebysaid bolt may be turned in said T-slot permitting said head to underliethe overhanging walls of said T-slot, and opposite sides of said bossengaging opposite walls of said recess whereby said bolt is-preventedfrom rotating relative to said body and said carrier, and means on saidbolt for rigidly and adjustably securing said knife carrier to saidbody.

In testimony whereof, I hereunto .set my hand in the presence of twowitnesses.

MAGNUS w. MATTISON.

In the presence of E. M. IRISH, J. W. DOWNING.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

a h ngton, 1). Q3. I r

